<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>default style</title>
    <style>
        *{
            margin:0;
            padding:0;
        }
    </style>
</head>
<body>
    <div>DIV元素</div>
    <ul>
        <li>LI元素</li>
        <li>LI元素</li>
    </ul>
</body>
</html>